Shop DEF Diesel Exhaust Fluid in 55-Gallons Drum/Barrel or 275-Gallon Totes | FREE SHIPPING | API DEF meets the Standards of ISO 22241
DEF is API certified, which ensures optimum performance of your Selective Catalytic Reduction (SCR) system
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What Is DEF Diesel Exhaust Fluid?
Diesel exhaust fluid is one of the key elements of the Selective Catalytic Reduction (SCR) process used by most medium and heavy-duty engine builders to meet EPA 2010 regulations.
DEF is a nontoxic solution of 67.5% purified water and 32.5% ultra pure automotive grade urea. DEF is not a fuel or fuel additive. Instead, when injected into the exhaust stream and passed over a catalyst, DEF helps convert NOx into nitrogen gas and water vapor – two harmless and natural components of the air we breathe.
DEF is stable, colorless and odorless, and meets ISO Standards 22241 for purity and composition and is an American Petroleum Institute (API) certified diesel exhaust fluid. These are the highest quality and safety standards in place to ensure optimum SCR performance.
Making sure you do not run out of DEF in a SCR equipped truck is simple – watch the Diesel Exhaust Fluid (DEF) gauge, which is part of the diesel fuel gauge, for when it is time to refill.
DEF is stored in a dedicated tank next to the fuel tank on the driver's side. The tanks range in size from 6 to 23 gallons depending on the truck's application. The DEF tank fill opening is designed to accommodate a DEF fill nozzle to ensure only DEF is put into the tank. A diesel fuel nozzle will not fit into the DEF tank opening.
Specifications
DEF FAQs
How much DEF will my truck use?
One gallon of DEF is used approximately every 300 miles. A truck with a 20 gallon DEF tank can go up to 6,000 miles between fill-ups.
Will a truck stop if it runs out of DEF?
No. An engine will not be shut down or be unable to restart as a result of running out of DEF. However, if the DEF tank is empty, engine horsepower will de-rate and BlueDEF should be added to the tank.
Will DEF freeze in cold weather?
DEF begins freezing at 12° Fahrenheit (-11° Celsius). If DEF freezes, the engine will start and run properly (no de-rate or malfunctioning lights). A DEF tank heater will thaw the fluid for use and at no point will this affect the operation of the engine.
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